Lives in Long Island, New York and has pursued a successful career in engineering design. In his spare time, when he's not busy bringing the V2 missile to life for the 21st century or picking out riffs on his favourite guitar, he can be found working on a time machine in his basement. His destination will be Huntsville, 1955 and just the chance to be "a steely-eyed missile man."

This month’s question

Mystery object

This part has a helicoid or screw shape, it seems that it might have been designed to screw into a pipe of some kind. But do you know what it is, and what it did? If you do, click on it and tell us.

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